70 void ext4_release_crypto_ctx(struct ext4_crypto_ctx *ctx)  in ext4_release_crypto_ctx()  argument
74 	if (ctx->flags & EXT4_WRITE_PATH_FL && ctx->w.bounce_page)  in ext4_release_crypto_ctx()
75 		mempool_free(ctx->w.bounce_page, ext4_bounce_page_pool);  in ext4_release_crypto_ctx()
76 	ctx->w.bounce_page = NULL;  in ext4_release_crypto_ctx()
77 	ctx->w.control_page = NULL;  in ext4_release_crypto_ctx()
78 	if (ctx->flags & EXT4_CTX_REQUIRES_FREE_ENCRYPT_FL) {  in ext4_release_crypto_ctx()
79 		kmem_cache_free(ext4_crypto_ctx_cachep, ctx);  in ext4_release_crypto_ctx()
82 		list_add(&ctx->free_list, &ext4_free_crypto_ctxs);  in ext4_release_crypto_ctx()
98 	struct ext4_crypto_ctx *ctx = NULL;  in ext4_get_crypto_ctx()  local
117 	ctx = list_first_entry_or_null(&ext4_free_crypto_ctxs,  in ext4_get_crypto_ctx()
119 	if (ctx)  in ext4_get_crypto_ctx()
120 		list_del(&ctx->free_list);  in ext4_get_crypto_ctx()
122 	if (!ctx) {  in ext4_get_crypto_ctx()
123 		ctx = kmem_cache_zalloc(ext4_crypto_ctx_cachep, GFP_NOFS);  in ext4_get_crypto_ctx()
124 		if (!ctx) {  in ext4_get_crypto_ctx()
128 		ctx->flags |= EXT4_CTX_REQUIRES_FREE_ENCRYPT_FL;  in ext4_get_crypto_ctx()
130 		ctx->flags &= ~EXT4_CTX_REQUIRES_FREE_ENCRYPT_FL;  in ext4_get_crypto_ctx()
132 	ctx->flags &= ~EXT4_WRITE_PATH_FL;  in ext4_get_crypto_ctx()
136 		if (!IS_ERR_OR_NULL(ctx))  in ext4_get_crypto_ctx()
137 			ext4_release_crypto_ctx(ctx);  in ext4_get_crypto_ctx()
138 		ctx = ERR_PTR(res);  in ext4_get_crypto_ctx()
140 	return ctx;  in ext4_get_crypto_ctx()
200 		struct ext4_crypto_ctx *ctx;  in ext4_init_crypto()  local
202 		ctx = kmem_cache_zalloc(ext4_crypto_ctx_cachep, GFP_NOFS);  in ext4_init_crypto()
203 		if (!ctx) {  in ext4_init_crypto()
207 		list_add(&ctx->free_list, &ext4_free_crypto_ctxs);  in ext4_init_crypto()
227 	struct ext4_crypto_ctx *ctx =  in ext4_restore_control_page()  local
233 	ext4_release_crypto_ctx(ctx);  in ext4_restore_control_page()
312 static struct page *alloc_bounce_page(struct ext4_crypto_ctx *ctx)  in alloc_bounce_page()  argument
314 	ctx->w.bounce_page = mempool_alloc(ext4_bounce_page_pool, GFP_NOWAIT);  in alloc_bounce_page()
315 	if (ctx->w.bounce_page == NULL)  in alloc_bounce_page()
317 	ctx->flags |= EXT4_WRITE_PATH_FL;  in alloc_bounce_page()
318 	return ctx->w.bounce_page;  in alloc_bounce_page()
339 	struct ext4_crypto_ctx *ctx;  in ext4_encrypt()  local
345 	ctx = ext4_get_crypto_ctx(inode);  in ext4_encrypt()
346 	if (IS_ERR(ctx))  in ext4_encrypt()
347 		return (struct page *) ctx;  in ext4_encrypt()
350 	ciphertext_page = alloc_bounce_page(ctx);  in ext4_encrypt()
353 	ctx->w.control_page = plaintext_page;  in ext4_encrypt()
359 		ext4_release_crypto_ctx(ctx);  in ext4_encrypt()
363 	set_page_private(ciphertext_page, (unsigned long)ctx);  in ext4_encrypt()
389 	struct ext4_crypto_ctx	*ctx;  in ext4_encrypted_zeroout()  local
405 	ctx = ext4_get_crypto_ctx(inode);  in ext4_encrypted_zeroout()
406 	if (IS_ERR(ctx))  in ext4_encrypted_zeroout()
407 		return PTR_ERR(ctx);  in ext4_encrypted_zeroout()
409 	ciphertext_page = alloc_bounce_page(ctx);  in ext4_encrypted_zeroout()
450 	ext4_release_crypto_ctx(ctx);  in ext4_encrypted_zeroout()